For him, it’s also a personal mission. Greenberg used to be an obese child.

Below, he shares his own story about how he traversed (literally) from sedentary kid to outdoor enthusiast and how his transformation was aided by some gentle parental encouragement. The word “gentle” was the key element, he argues, suggesting a parent’s heavy-handed approach is often a cause, not a solution, to the problem.

He also offers information about broader efforts to turn the obesity trend. What better time to do it than in 2012?